https://bugs.llvm.org/show_bug.cgi?id=42247
Bug ID: 42247
Summary: Diagnostic missing for redefinition
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: C++
Assignee: unassignedclangb...@nondot.org
Reporter: zhong...@pku.org.cn
CC: blitzrak...@gmail.com, dgre...@apple.com,
erik.pilking...@gmail.com, llvm-bugs@lists.llvm.org,
richard-l...@metafoo.co.uk
My clang is 9.0.0, and the code is:
class foo {
public:
typedef int bar;
};
class baz {
public:
foo::bar foo;
};
clang accepts with any warning messages. Although a diagnostic is not strictly
required by the standard (§3.3.6, basic.scope.class), but would be very useful.
The code comes from a gcc bug report:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=28513
gcc 10.0.0 rejects the code:
error: declaration of ‘foo baz::foo’ changes meaning of ‘foo’ [-fpermissive]
9 | foo foo;
| ^~~
/home/haozhong/project/approach/compilerpara/gcc/tmp/gcc_28513/code1.c.cpp:1:7:
note: ‘foo’ declared here as ‘class foo’
1 | class foo {
| ^~~
Shall clang present similar warning messages?
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